Talk to Saria and then go to the training center. The training center is to the left of your house, the south end of the map. If you didn't get the instruction book read all the signs here with A, and talk to the Know-It-All-Brothers in the house nearby to learn more about how to play the game. Go to the back of the training center and find the hole in the wall. Crawl through, dodge around the boulder, and find the chest to get your sword. Return through the hole. Walk around the village, talk to the Kokiri's, and walk through grass, slash bushes, throw rocks and pots, and look around to earn money. Find Mido's house and go inside to steal his money from the treasure chests inside there. Once you have 40 rupees, go to the shop with the red roof and buy a Deku shield. Equip the shield and sword in your subscreen and then exit the town on the East side of the map. You'll have to talk to Mido to get through.